Fluid-pressure regulator



(No Model.) 1

J. W. SCOTT. FLUID PRESSURE REGULATOR.

. No. 552,202. Patented'Deo. 3 1, 1895.

Wnrdesses r y M AMWW ANDREW B GRAHAM. PHOTO UTHQWASHINGTDILDC.

NITED STATES PATENT FFICE.

JAMES WV. SCOTT, OF COLORADO SPRINGS, COLORADO.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent No. 552,202, dated December31,1895.

Application filed April 12, 1895. Serial No. 545,447. (No model.)

To aZZ whom it may concern:

Beit known that I, JAMES W. SCOTT, a citizen of the United States,residing at Colorado Springs, in the county of El Paso and State ofColorado, have invented certain new and useful Improvements inFluid-Pressure Regulators; and I do hereby declare that the following isa full, clear, and exact description thereof, such as will enable othersto make and use the same, reference being had to the accompanyingdrawings, forming a part of this specification.

My invention has for its object primarily to control the resistance ofthe valve anterior to the admission of the fluid under degrees ofpressure corresponding to the predetermined resistance of said valve,and thereby regulate the quantity of fluid which it is desired to passthrough the valve in a definite space of time, and, second, to equalizein degree the fluidpressure upon all parts of the valve and preventback-pressure.

My invention further consists in the novel construction and combinationof parts, such as will first be fully described, and specificallypointed out in the claim.

In the drawings, Figure 1 is a view in elevation of the improvedfluid-pressure regulator and indicator, showing the receiver andpressure-regulating valve in vertical section. Fig. 2 is a detail viewin perspective of the valve.

Similar letters of reference indicate corresponding parts in all thefigures.

A in the drawings represents a receiver for fluids, which consists oftwo horizontal circular plates a a, which are depressed outwardly inopposite directions to each other, and be tween the inner side portionof which plates is a chamber a Upon the outer edge portion of the platea is an annular. flange a and upon plate a is an annular flange a whichflanges are fitted together and provided with registering perforations aarranged at suitable distances apart from each other and extendingaround the said flanges. In the perforations a are bolts a, secured bythe nuts a.

In the central portion of the plate a is threaded opening a To the outerside portion of plate a and integral therewith is a hollow casting C,which extends in a direction horizontal to the line of the axis of thereceiver A. In one end portion of the castin g C, in the threadedopening 0, is fitted one end of an induction-pipe D. In the other endportion of said casting is an opening 0, in

which is fitted one end of an eduction-pipe E.

In the sideportion of the casting C, in a vertical line with the openinga in the plate a,

is a circular screw-threaded opening 0 ,111

In ,the plate a a short distance from theopening a is an opening whichcommunioates with the eduction-opening c in the casting 0. Between therespective openings 0 and alis a web 0 which extends from the inner sideportion of the casting C at a point between the opening 0 for the cap Fand the eductionopening 0 in the casting C and in an upward direction tothe opening (4*, forming one side of said opening. Said web 0 alsoextends in a transverse direction from one inner side portion to theother of said casting C, so that the fluid in chamber a will passthrough the opening 0 outwardly through pipe E.

In the chamber 0 formed by the casting C and cap F is placed theregulator-valve G. The valve-guide consists of atube H, which is closedat one end, as at h, the diameter of which is less than the describedwidth of the opening a Upon the other end of said tube is anexternally-threaded flange h, which is fitted to the screw-threadedopening a in the plate a. The closed'end of the valve-guide l-I extendswithin the cap F to a point a short distance from the inner side portionof said cap. Over the tube 11 is fitted loosely the valve G, whichconsists of a tube fitted loosely over the closed tube or guide H. Inthe outer end portion of the valve or tube G is an opening g. Concentricwith and forming the sides of said opening g is a flange g, betweenwhich and the outer end portion h of the guide II is formed a valve-seatg The other end portion of the tube or valve G is fitted to bear uponthe valve-seat 71 which is formed by the portion of the flange hconcentric with the tube H, both of which valve-seats are ground so asto fit when in a closed position. In one side of the tube II at a pointtransversely in line with the valve-seat 7L2 is a port or openinghflwhich communicates with the chamber o In the other side of said tubeis a similar opening 7b", which also communicates with chamber 0*. Inthe tube H is a spindle or valve-stem I. From the opposite sides of thestem I, at a point a short distance from the inner end portion of stemI, extend the guide-pins i i which connect with the inner side portionof the tube II.

In the tube or valve-guide II a short distance from the end portion 9 isa vertical slot 7L5. In the other side of said tube is a slot 71/ In thevalve G registering with the slots 7L5 h are the perforations g In theextreme inner end portion of the stem I is a transverse perforation '11.Through the perforation in the valve G and the perforation t" in thestem I and the slots 7L5 h in the tube II is inserted a bolt K, which isprovided with a head at one end and screw-threaded at the other andprovided with a securing-nut 7a In the chamber a of the receiver A is adiaphragm L, which consists of a circular depressed plate or disk whichis comparatively thin and capable of flexion. The outer edge portion ofsaid diaphragm extends between the flanges a a of the receiver A and isclamped in position between said flanges.

To the upper end portion of the stem I is attached a circularflange-plate i which fits against the under side portion of thediaphragm L. In the diaphragm L is an opening Z.

I To the upper side portion of the flange i is rigidly attached a pin iwhich extends upwardly through the opening Z in the diaphragm L, and isscrew-threaded at the upper end.

In the plate a above the diaphragm L is a circular opening a". Extendingin an upward direction a short distance from plate a and around saidopening is a flange a \Vithin the chamber a and bearing upon the upperside of the diaphragm L is a circular plate M, the under surface ofwhich is curved slightly, so as to conform to the line of the depressionin the diaphragm L. To the upper side portion of the plate is attached acircular upwardly-extended flange m. In the plate M is an openingm,which receives the pin 0?, and upon which stem is fitted within theflange m the nut 1". To the outer side portion of the flange m isattached rigidly a standard N, and upon the other side portion of saidflange is attached a standard N, both of which standards extend aconsiderable distance in an upward direction and are connected at theirupper ends by the crossbar N Upon the inner side portion of the standardN is a vertical guide-strip n, and upon the inner side portion of thestandard N is a guide-strip 01.. Between the standards N N is a movablehead-block O, which consists of a circular plate which is slotted uponeach side at 0 0 to receive the respective guides or n on the standardsN N. In the head-block 0 is a vertical opening 0. Between the standardsN N, and bearing upon the plate M, between the sides of the flange m ofsaid plate at one end, is a spring P, the other end of which springbears against the under side portion of the head-block O. Said spring ismade to sustain the degrees of pressure required to measure the same infoot-pounds or balance the fluid-pressure, as hereinafter described.

In the head-block N is a threaded opening 01 which receives a screw R,the lower portion of which screw is made smooth and fits within theopening 0 in the head-block O, and provided with a shoulder 0', whichbears direct upon said head-block. Upon the up per end portion of thescrew R is a bandwheel B.

To the standard N near the cross-bar N is attached rigidly one end of anindicationdial S, which consists of a semicircular plate, the other endof which plate is attached to the said standard a suitable distancebelow the position of the upper end. Upon the dial S is a scale 8.

Upon the cross-head 0 near the standard N is secured adjustably avertical rack T. To the standard N at a point equidistant from the upperand lower ends of the dial S is pivoted a dial-finger V, which extendsto the dial S and moves in the arc of a circle. The pivoted portion ofsaid finger consists of a pinion '0, which engages with the rack T.

In the operation of my improved pressureregulator the hand-wheel R isturned a sufficient number of times to cause the degree of pressure uponspring P, which is required to be offset by an equal number of poundspressure upon the diaphragm L, which is exerted by the liquid. Thedegree of contraction of the spring P by the pressure of the head-blockis at once indicated by the finger V, which passes over the scale s andstops at the point at which the tension of the spring P is now placed.For illustration, the compression of the spring P is given a tensionwhich indicates six pounds upon the dial. The position of the valve G isopen so as to admit the fluid through the ports 71. 7L4. The fluid isthen admitted to the chamber a through the induction-pipe D, whichpasses in chamber e and around the valve G, and exerts pressure againstthe diaphragm L. So long as the pressure of the fluid does not exceedthe stated degree of pressure-viz. six poun ds-the valve remains openand the fluid passes through the opening 0", outwardly through theeduction-pipe E. At the moment the increase of pressure occurs, however, in the fluid which is entering the induction pipe D, and in excessof the six pounds, as stated, the spring P yields to cause the diaphragmto move upward, and in this movement the valve-stem I, which isconnected with the diaphragm, is moved in position and the valve Gcloses the ports h h", and they remain closed until the pressure of thefluid has lessened in degree or corresponding to the position indicatedupon the dial S. In the pressure exerted by the fluid the back- IIOpressure it Willbe observed is counteracted by the disparity in thewidth of the valve-seats,

which are in my invention so designed as to offer but little surface tothe resistance of the fluid, and at the same time permit theequalization of the pressure of the fluid upon all parts of the valve.The space between the valve G and the guide-tube H is sufficiently largeto admit the fluid and prevent the tendency of the valve to stick orrefuse to close. In the Operation of the valve it is practicallyperforming areciprocal movernent during the time the fluid .is beingsupplied. When springs are placed in positionbeneath the head-block,their tension varies, and to meet this variance the rack T is adjustedin position so as to set the indicatorfinger G at a uniformstarting-point, as at zero, on the indicator.

Having fully described my invention, what I now claim as new, and desireto secure by Letters Patent, is

In a fluid pressure regulator a receiver for the fluid having inductionand eduction openings and a diaphragm Within said receiver acircularflange at the closed end of said valve guide a pin extending through theperforations in said valve and also through the slots in said valveguide and a valve stem within said valve guide connected with said pinat one end and also with the said diaphragm at the other endsubstantially as shown and described.

JAMES W. SCOTT. Witnesses:

JOSEPH RosENTHAL, S. L. C. HASSON.

